Formal & Physical Sciences Science — General & HistoryENMy Journey on Mathematics - Don't Count it, Categorify!KenMarch 19, 2026 93 min★ ★ ★ ☆ ☆ 3/5MathematicsCategory TheoryCategorification
Formal & Physical Sciences MathematicsENLegendre Symbol, Jacobi Symbol | Elementary Number Theory Lec 10 | Nge Kie Seng 250316Nge Kie SengMarch 16, 2026 164 min★ ★ ★ ★ ☆ 4/5Legendre SymbolJacobi SymbolQuadratic Reciprocity
Formal & Physical Sciences MathematicsENQuadratic Residues | Elementary Number Theory Lec 9 | Nge Kie Seng 250313Nge Kie SengMarch 13, 2026 173 min★ ★ ★ ★ ☆ 4/5Quadratic ResiduesLegendre SymbolEuler's Criterion
Formal & Physical Sciences MathematicsENThe Existence of Primitive Roots | Elementary Number Theory Lec 8 | Nge Kie Seng 250311Nge Kie SengMarch 11, 2026 162 min★ ★ ★ ★ ☆ 4/5Primitive RootsNumber TheoryModular Arithmetic
Formal & Physical Sciences MathematicsENThe Existence of Primitive Roots | Elementary Number Theory Lec 7 | Nge Kie Seng 250309Nge Kie SengMarch 9, 2026 171 min★ ★ ★ ★ ☆ 4/5Primitive RootsNumber TheoryModular Arithmetic
Formal & Physical Sciences MathematicsENCrytography, Primitive Roots | Elementary Number Theory Lec 6 | Nge Kie Seng 250306Nge Kie SengMarch 8, 2026 168 min★ ★ ★ ★ ☆ 4/5Number TheoryCryptographyEuler's Totient
Formal & Physical Sciences MathematicsENMultiplicative Functions | Elementary Number Theory Lec 5 | Nge Kie Seng 250304Nge Kie SengMarch 4, 2026 182 min★ ★ ★ ★ ☆ 4/5Number TheoryMultiplicative FunctionsEuler's Totient
Formal & Physical Sciences MathematicsENChinese Remainder Thm, Euler's Thm | Elementary Number Theory Lec 4 | Nge Kie Seng 250228Nge Kie SengMarch 2, 2026 173 min★ ★ ★ ★ ☆ 4/5Number TheoryChinese Remainder TheoremEuler's Theorem
Formal & Physical Sciences MathematicsENLinear Congruence | Elementary Number Theory Lecture 3 | Nge Kie Seng 250228Nge Kie SengFebruary 28, 2026 175 min★ ★ ★ ★ ☆ 4/5Number TheoryCongruenceModular Arithmetic
Formal & Physical Sciences MathematicsENBezout's Theorem, Diophantine Equation | Elementary Number Theory Lecture 2 | Nge Kie Seng 250225Nge Kie SengFebruary 26, 2026 170 min★ ★ ★ ★ ☆ 4/5Number TheoryEuclidean AlgorithmBezout's Theorem
Formal & Physical Sciences MathematicsENPrimes, Divisibility, GCD | Elementary Number Theory Lecture 1 | Nge Kie Seng 250223Nge Kie SengFebruary 23, 2026 176 min★ ★ ★ ★ ☆ 4/5Number TheoryPrimesDivisibility
Formal & Physical Sciences MathematicsENNakajima Quiver Varieties | Adrian Tan Yue Qiang 2025.01.02Adrian Tan Yue QiangJanuary 2, 2026 17 min★ ★ ★ ☆ ☆ 3/5Nakajima Quiver VarietiesGeometric Invariant TheoryQuiver Representations
Formal & Physical Sciences MathematicsENHilbert Schemes of n Points | Yao Yichen 2025.01.02Yao YichenJanuary 2, 2026 20 min★ ★ ★ ★ ☆ 4/5Hilbert SchemeScheme TheoryAlgebraic Geometry
Formal & Physical Sciences MathematicsENFinals Revision Question | Calculus I A Lecture 27 | Nge Kie Seng 20260102Nge Kie SengJanuary 2, 2026 162 min★ ★ ★ ★ ☆ 4/5CalculusRiemann SumIntegration
Formal & Physical Sciences MathematicsENClassification of Semisimple Lie Algebras | Liu Xiaoyue 2025.01.02Liu XiaoyueJanuary 2, 2026 19 min★ ★ ★ ☆ ☆ 3/5Lie AlgebrasSemisimpleRoot Systems
Formal & Physical Sciences MathematicsENKunneth Formula & Poincare Duality | Algebraic Topology Lecture 27 | Nge Kie Seng 251231Nge Kie SengDecember 31, 2025 115 min★ ★ ★ ★ ☆ 4/5Künneth FormulaPoincaré DualityAlgebraic Topology
Formal & Physical Sciences MathematicsENCohomology Ring | Algebraic Topology Lecture 26 | Nge Kie Seng 251229Nge Kie SengDecember 29, 2025 113 min★ ★ ★ ☆ ☆ 3/5CohomologyAlgebraic TopologyCup Product
Formal & Physical Sciences MathematicsENSeparable Equations | Calculus I A Lecture 25 | Nge Kie Seng 20251227Nge Kie SengDecember 27, 2025 175 min★ ★ ★ ★ ☆ 4/5Differential EquationsSeparable EquationsCalculus
Formal & Physical Sciences MathematicsENCup Products | Algebraic Topology Lecture 25 | Nge Kie Seng 251224Nge Kie SengDecember 24, 2025 113 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyCup ProductCohomology
Formal & Physical Sciences MathematicsENCohomology of Spaces | Algebraic Topology Lecture 24 | Nge Kie Seng 251222Nge Kie SengDecember 22, 2025 110 min★ ★ ★ ★ ☆ 4/5CohomologyAlgebraic TopologyUniversal Coefficient Theorem
Formal & Physical Sciences MathematicsENCohomology | Algebraic Topology Lecture 23 | Nge Kie Seng 251218Nge Kie SengDecember 18, 2025 107 min★ ★ ★ ★ ☆ 4/5CohomologyAlgebraic TopologyDe Rham Cohomology
Formal & Physical Sciences MathematicsENSimplicial Homology = Singular Homology | Algebraic Topology Lecture 19 | Nge Kie Seng 251203Nge Kie SengDecember 3, 2025 108 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyHomologySimplicial Homology
Formal & Physical Sciences MathematicsENDelta-Complexes | Algebraic Topology Lecture 13 | Nge Kie Seng 251112Nge Kie SengNovember 12, 2025 111 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyDelta-ComplexSimplicial Homology
Formal & Physical Sciences MathematicsENDefinite Integral | Calculus I A Lecture 13 | Nge Kie Seng 20251112Nge Kie SengNovember 12, 2025 111 min★ ★ ★ ★ ☆ 4/5CalculusIntegrationSigma Notation
Formal & Physical Sciences MathematicsENCovering the Orbit Spaces | Algebraic Topology Lecture 12 | Nge Kie Seng 251110Nge Kie SengNovember 10, 2025 112 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyCovering SpacesOrbit Spaces
Formal & Physical Sciences MathematicsENUniversal Covers | Algebraic Topology Lecture 10 | Nge Kie Seng 251103Nge Kie SengNovember 3, 2025 116 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyCovering SpacesUniversal Cover
Formal & Physical Sciences MathematicsENMaxima, Minima, Mean Value Theorem | Calculus I A Lecture 9 | Nge Kie Seng 20251029Nge Kie SengOctober 29, 2025 114 min★ ★ ★ ★ ☆ 4/5CalculusDerivativesMaxima
Formal & Physical Sciences MathematicsENCovering Spaces | Algebraic Topology Lecture 9 | Nge Kie Seng 251029Nge Kie SengOctober 29, 2025 110 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyCovering SpacesFundamental Group
Formal & Physical Sciences MathematicsENEvery Group is a Fundamental Group | Algebraic Topology Lecture 8 | Nge Kie Seng 251027Nge Kie SengOctober 27, 2025 116 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyFundamental GroupCW Complex
Formal & Physical Sciences MathematicsENRelated Rates of Change | Calculus I A Lecture 8 | Nge Kie Seng 20251024Nge Kie SengOctober 24, 2025 169 min★ ★ ★ ★ ☆ 4/5CalculusRelated RatesImplicit Differentiation
Formal & Physical Sciences MathematicsENImplicit Differentiation | Calculus I A Lecture 7 | Nge Kie Seng 20251022Nge Kie SengOctober 22, 2025 113 min★ ★ ★ ★ ☆ 4/5CalculusImplicit DifferentiationChain Rule
Formal & Physical Sciences MathematicsENCell Complexes | Algebraic Topology Lecture 7 | Nge Kie Seng 251022Nge Kie SengOctober 22, 2025 112 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyCW ComplexCell Complex
Formal & Physical Sciences MathematicsENDifferentiability of Real-Valued Functions | Calculus I A Lecture 5 | Nge Kie Seng 20251015Nge Kie SengOctober 15, 2025 114 min★ ★ ★ ★ ☆ 4/5CalculusDifferentiabilityContinuity
Formal & Physical Sciences MathematicsENDeformation Retracts | Algebraic Topology Lecture 5 | Nge Kie Seng 251013Nge Kie SengOctober 13, 2025 121 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyDeformation RetractHomotopy
Formal & Physical Sciences MathematicsENContinuity of Real-Valued Functions of One Variable | Calculus I A Lecture 4 | Nge Kie Seng 20251010Nge Kie SengOctober 10, 2025 172 min★ ★ ★ ★ ☆ 4/5CalculusContinuityLimits
Formal & Physical Sciences MathematicsENLimits of Real-Valued Functions of One Variable | Calculus I A Lecture 3 | Nge Kie Seng 20251008Nge Kie SengOctober 8, 2025 111 min★ ★ ★ ★ ☆ 4/5CalculusLimitsReal-Valued Functions
Formal & Physical Sciences MathematicsENFunctoriality of Induced Homorphism on pi_1 | Algebraic Topology Lecture 4 | Nge Kie Seng 251008Nge Kie SengOctober 8, 2025 113 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyFundamental GroupCovering Spaces
Formal & Physical Sciences MathematicsENThe Fundamental Group of a Circle | Algebraic Topology Lecture 3 | Nge Kie Seng 251006Nge Kie SengOctober 6, 2025 116 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyFundamental GroupCovering Spaces
Formal & Physical Sciences MathematicsENExamples of Functions | Calculus I A Lecture 2 | Nge Kie Seng 20251003Nge Kie SengOctober 3, 2025 171 min★ ★ ★ ★ ☆ 4/5CalculusFunctionsDomain
Formal & Physical Sciences MathematicsENSimply Connectedness | Algebraic Topology Lecture 2 | Nge Kie Seng 251002Nge Kie SengOctober 2, 2025 105 min★ ★ ★ ★ ☆ 4/5Algebraic TopologyFundamental GroupHomotopy
